import React from "react";
import ReactDOM from "react-dom";
import {deepCopy} from "share/common";

/*
 * Tween.js
 * t: current time（当前时间）
 * b: beginning value（初始值）
 * c: change in value（变化量）
 * d: duration（持续时间）
*/
let Tween = {
  Linear: function(t, b, c, d) { return c*t/d + b; },
  Quad: {
    easeIn: function(t, b, c, d) {
      return c * (t /= d) * t + b;
    },
    easeOut: function(t, b, c, d) {
      return -c *(t /= d)*(t-2) + b;
    },
    easeInOut: function(t, b, c, d) {
      if ((t /= d / 2) < 1) return c / 2 * t * t + b;
      return -c / 2 * ((--t) * (t-2) - 1) + b;
    }
  },
  Cubic: {
    easeIn: function(t, b, c, d) {
      return c * (t /= d) * t * t + b;
    },
    easeOut: function(t, b, c, d) {
      return c * ((t = t/d - 1) * t * t + 1) + b;
    },
    easeInOut: function(t, b, c, d) {
      if ((t /= d / 2) < 1) return c / 2 * t * t*t + b;
      return c / 2*((t -= 2) * t * t + 2) + b;
    }
  },
  Quart: {
    easeIn: function(t, b, c, d) {
      return c * (t /= d) * t * t*t + b;
    },
    easeOut: function(t, b, c, d) {
      return -c * ((t = t/d - 1) * t * t*t - 1) + b;
    },
    easeInOut: function(t, b, c, d) {
      if ((t /= d / 2) < 1) return c / 2 * t * t * t * t + b;
      return -c / 2 * ((t -= 2) * t * t*t - 2) + b;
    }
  },
  Quint: {
    easeIn: function(t, b, c, d) {
      return c * (t /= d) * t * t * t * t + b;
    },
    easeOut: function(t, b, c, d) {
      return c * ((t = t/d - 1) * t * t * t * t + 1) + b;
    },
    easeInOut: function(t, b, c, d) {
      if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b;
      return c / 2*((t -= 2) * t * t * t * t + 2) + b;
    }
  },
  Sine: {
    easeIn: function(t, b, c, d) {
      return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
    },
    easeOut: function(t, b, c, d) {
      return c * Math.sin(t/d * (Math.PI/2)) + b;
    },
    easeInOut: function(t, b, c, d) {
      return -c / 2 * (Math.cos(Math.PI * t/d) - 1) + b;
    }
  },
  Expo: {
    easeIn: function(t, b, c, d) {
      return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
    },
    easeOut: function(t, b, c, d) {
      return (t==d) ? b + c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
    },
    easeInOut: function(t, b, c, d) {
      if (t==0) return b;
      if (t==d) return b+c;
      if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
      return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
    }
  },
  Circ: {
    easeIn: function(t, b, c, d) {
      return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
    },
    easeOut: function(t, b, c, d) {
      return c * Math.sqrt(1 - (t = t/d - 1) * t) + b;
    },
    easeInOut: function(t, b, c, d) {
      if ((t /= d / 2) < 1) return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
      return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
    }
  },
  Elastic: {
    easeIn: function(t, b, c, d, a, p) {
      var s;
      if (t==0) return b;
      if ((t /= d) == 1) return b + c;
      if (typeof p == "undefined") p = d * .3;
      if (!a || a < Math.abs(c)) {
        s = p / 4;
        a = c;
      } else {
        s = p / (2 * Math.PI) * Math.asin(c / a);
      }
      return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
    },
    easeOut: function(t, b, c, d, a, p) {
      var s;
      if (t==0) return b;
      if ((t /= d) == 1) return b + c;
      if (typeof p == "undefined") p = d * .3;
      if (!a || a < Math.abs(c)) {
        a = c;
        s = p / 4;
      } else {
        s = p/(2*Math.PI) * Math.asin(c/a);
      }
      return (a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b);
    },
    easeInOut: function(t, b, c, d, a, p) {
      var s;
      if (t==0) return b;
      if ((t /= d / 2) == 2) return b+c;
      if (typeof p == "undefined") p = d * (.3 * 1.5);
      if (!a || a < Math.abs(c)) {
        a = c;
        s = p / 4;
      } else {
        s = p / (2  *Math.PI) * Math.asin(c / a);
      }
      if (t < 1) return -.5 * (a * Math.pow(2, 10* (t -=1 )) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
      return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p ) * .5 + c + b;
    }
  },
  Back: {
    easeIn: function(t, b, c, d, s) {
      if (typeof s == "undefined") s = 1.70158;
      return c * (t /= d) * t * ((s + 1) * t - s) + b;
    },
    easeOut: function(t, b, c, d, s) {
      if (typeof s == "undefined") s = 1.70158;
      return c * ((t = t/d - 1) * t * ((s + 1) * t + s) + 1) + b;
    },
    easeInOut: function(t, b, c, d, s) {
      if (typeof s == "undefined") s = 1.70158;
      if ((t /= d / 2) < 1) return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
      return c / 2*((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
    }
  },
  Bounce: {
    easeIn: function(t, b, c, d) {
      return c - Tween.Bounce.easeOut(d-t, 0, c, d) + b;
    },
    easeOut: function(t, b, c, d) {
      if ((t /= d) < (1 / 2.75)) {
        return c * (7.5625 * t * t) + b;
      } else if (t < (2 / 2.75)) {
        return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b;
      } else if (t < (2.5 / 2.75)) {
        return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b;
      } else {
        return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b;
      }
    },
    easeInOut: function(t, b, c, d) {
      if (t < d / 2) {
        return Tween.Bounce.easeIn(t * 2, 0, c, d) * .5 + b;
      } else {
        return Tween.Bounce.easeOut(t * 2 - d, 0, c, d) * .5 + c * .5 + b;
      }
    }
  }
};
Math.tween = Tween;

/**
 * 经测试transform属性在ie9显示不流畅，请尽量用定位代替
 * setProperty兼容ie9参数必须为字符串类型不能为数值，已经做好了转换，使用时可以使用不带单位的数值
 *
 * @param node 发生动画的dom节点或ReactNode
 * @param originStyle 初始样式 eg: {opacity: 0}
 * @param targetStyle 目标样式 eg: {opacity: 1}
 * @param duration 持续时间
 * @param timingFunc 速度曲线
 * @param delay 动画开始前等待的时间
 * @param iterationCount 动画播放次数  为Infinity无限次播放
 */
function tween(node, originStyle, targetStyle, duration = 400, timingFunc = Math.tween.Sine.easeInOut, delay = 0, iterationCount = 1) {
  let dom = ReactDOM.findDOMNode(node);
  let startTime = Date.now();
  let oStyle = deepCopy(originStyle);
  let tStyle = deepCopy(targetStyle);
  let moveFunc = function moveFunc() {
    let timestamp = Date.now();
    let time = timestamp - startTime;
    let changeStyle = Object.keys(oStyle);
    changeStyle.map(item => {
      let regx = /-?\d+/;
      let originVal = Number(`${oStyle[item]}`.match(regx)[0]);
      let changeVal = Number(`${tStyle[item]}`.match(regx)[0] - `${oStyle[item]}`.match(regx)[0]);
      let targetVal = timingFunc(time, originVal, changeVal, duration);
      if((item === "top" || item === "left" || item === "right" || item === "bottom" || item === "height" || item === "width") && `${tStyle[item]}`.indexOf("px") === -1 && `${tStyle[item]}`.indexOf("%") === -1 && tStyle[item] !== 0)
        tStyle[item] += "px";
      if(`${oStyle[item]}`.indexOf("px") > -1 && tStyle[item] === 0)
        tStyle[item] += "px";
      if(`${oStyle[item]}`.indexOf("%") > -1 && tStyle[item] === 0)
        tStyle[item] += "%";
      if(item === "transform"){
        let pfx = ["-webkit-", "-moz-", "-ms-", "-o-", ""];
        pfx.map(p => {
          dom.style.setProperty(`${p}${item}`, `${tStyle[item]}`.replace(regx, targetVal));
        })
      }else{
        dom.style.setProperty(item, `${tStyle[item]}`.replace(regx, targetVal));
      }
    });
    if (time < duration) {
      requestAnimationFrame(moveFunc);
    }else if(--iterationCount){
      startTime = Date.now();
      oStyle = deepCopy(originStyle);
      tStyle = deepCopy(targetStyle);
      requestAnimationFrame(moveFunc);
    }
  };
  setTimeout(() => {
    moveFunc();
  },delay);
}

export default tween
